Large Sky Area Multi-object Fiber Spectroscopic Telescope - LAMOST, has a 1.75m-diameter focal plane on which 4000
optical fibers are arranged in order to obtain the spectrums of astrometric objects. Each optical fiber is installed on a
mechanical unit which is driven by a cell controller. The mechanical units are installed on the focal plane one by one
closely with high density, and the focal plane is above-ground, so the cell controllers are very inconvenient to remove and
install. Each time when we maintain or upgrade the motor drive system of LAMOST, we need to download new program to
the cell controllers. But it always takes a lot of time to take out the cell controllers from the focal plane.
So we propose a wireless program-updated technology based on Zigbee which can download the program to the cell
controllers without removing and installing. In order to realize the goal, we need to update the FLASH of target controllers
without hardware connection. So we transmit the program through Zigbee wireless network which has been used in
LAMOST already. After we use the wireless update system based on Zigbee, it is much easier and convenient for us to
maintain or upgrade the motor drive system of LAMOST. In this paper we illustrate how to realize the wireless update
system from hardware and software.